Download FRC 2011 Sensor Manual

Analog Devices ADXL345 and ADW22307 Sensor Board
The sensor board in the 2011 FRC Kit of Parts hosts both an Analog Devices ADXL345
3-axis Digital Accelerometer and an Analog Devices ADW22307 1-axis Analog
Gyroscope.
Teams may choose to use the board as is or to separate it along the scored line.
Keeping the sensors connected may be helpful in cases where you want to use one to
back up the other. For example, the gyroscope is very good at finding rate of angular
change, but poor at finding absolute angle. The accelerometer can determine absolute
angle when the robot is stable, but is easily confused when the robot moves.
To separate the two sensors, gently and slowly flex the board. Do not attempt to
“snap” it, as you may damage the surface mounted components. Gradually increase the
applied force until you hear the faint ripping noise of the fibers splitting. It will suddenly
“give”, at which point you may bend it fully in half. Rub the newly separated edges
together over a garbage can to remove any left over debris. Remember to follow proper
ESD safety procedure any time you are handling the devices.
The dimensions of the printed circuit board are shown below. Units are mils
(thousandths of an inch).
© FIRST
2011 FRC Sensor Manual
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